Superheater unit



Sept. 28 1926.' 1,601,417

' 4 F. W. SHUPERT SUPERHEATER UMT Filed April 20, 1925 f 2 Sheets-Sheet l 4 Swanton EE E Fran-K W.v5h.up Erft 24 Z Jl I I sept. ze 192e. 1,601,417

F. W. SHUPERT SUPERHEATER UNIT.

Filed Apri1 20, 1925 2 shams-sheet 2 gwvwntoz Fr 111K M. E11-Lupari -Patented Sept. 28, 1926.

UNITED STATES FRANK W. vSI'lIU'PIElR'l, 0F SANFORD, FLORIDA.

SUPERHEATER UNIT.

Applicationrled April 20, 1925. Serial No. 24,640.

This invention relates to improvements in superheater units.

The primary object of this invention is the provision of a novel type of superheater unit.

A further and important object of this invention is the provision of a compact type of superheater unit which has a large heating surface, and which may be placed in a flue or other heating Vcasing in such manner as to permit an unobstructed draftto take place through the flue.

A further object of this invention is the provision of an improved superheater unit embodying a novel and compact construction which will permit of the unretarded flow of steam in a thin sheet through the superheater, so that the samel will be exposed uniformly to the heat surrounding the unit.

A further object of this invention is the provision of a novel type of superheater unit utilizing stock materials.

Other objects and advantages of this invention will be apparent during the course ofthe following detailed description.

In the accompanying drawings, forming a part of this specification, and wherein similar reference characters designate corrresponding parts throughout the several views,

Figure l is a perspective view of thev improved superheater unit.

Figure 2 is a longitudinal cross sectional view taken through the superheater unit showing the application of the same in the ue of a fire-box.

Figures 3, 4, 5 and 6 are cross sectional views taken substantially on their respective lines in Figure 2 of the drawings.

Figures 7, 8, 9, 10, and l1 are sectional and perspective views illustrating the successive steps used in forming the superheater unit from stock sizes of circular pipe.

vIn the drawings, wherein for the purpose of illustration is shown the improved superheater and the various steps by which the same is produced, the letter A may generally designate the improved superheater, which is adapted for positioning in a flue B of a furnace construction C.

The furnace C may be of the usual type, including a smoke box l5 in which one end of the flue B rests; the flue B providing a passageway 16 therethrough of uniform diameter, which outlets at its rear end into the Y length of each piece.

centric with the wall 25, although they are struck from different radii ,with the radius lire box compartment, in accordance with any of the well known constructions.

The superheater unit A is adapted for placement in the passageway 16 of the flue B facing the fire-box, with certain inlet and outlet connections extending into the smoke box.

The construction of the improved super-r heater A may best be described by taking up the sequence of the steps used in the mak-v as is illustrated in Figure 9, rolled into.

segmental form and providingthe spaced concavo-convex walls 24 and 25 connected by the arcuate edge portions 26, providing a shallow or thin vpassageway 27 of concave-convex cross section, and extending theV The wall 24 is conofthe wall 24 less than the radius of the wall 25. The pair of pipe sectionsy which form the main part of the superheatervin lieu of rolling to the concavo-convex form be pressed to such form.

The fire-box facing ends of the arcuate pieces mayv then be welded closed, as illustrated at 30 in the drawings, and tapered to a sharp edge 3l which faces the fire-box end in the flue passageway. This end of each of the sections of rolled or pressed pipe is thus made steam tight, and provides a nonbaflling surface exposed to advancing heated gases, which tends to divide theV heated gases into denite streams, without unduly restricting the same, and as ywill subsequentlyY appear. The 'next operation is that of cutting an elongated communicating passageway or port 33 in each of the arcuate sections 34 or 35. These ports are placed in the crown of the walls 25 of each of the sections 34 and 35, parallel with the respective sections, and 'immediately adjacent to the closed end 30. The ports 33 are preferably cut with an Oxy-acetylene torch, although other means of cutting the same may be used. The ports 33 of the two sections 34 and 35 are preferablyy of the same dimension, and located in the same relation in their respective sections. riihis step in the method of making the superheater is well illustrated on the section 34 illustrated in Figure l0 of the drawings.

The next operation is preferably that of connecting the concavo-convex hollow sections 34 and 35, at the ports 33, so as to communicate the passageways 27 of the sections 34 and 35. T his operation is preferably accomplished by placing a pair of spacers 40 and 41 between the crown portions of the walls 25 of the sections 34 and 35, at opposite ends of the ports 33; the pacers preferably being solder. The sections 34 and 35 are held in such relation with the ports 33 aligning by means of clamps 45 and 46, of any approved character, and the sections are now in position for the Welder. Either Oxy-acetylene or electric arc is used to flow the metal in about the ports 33, and such welding is accomplished so that the ports 33 are not closed up, and the metal is iiowed peripherally about the ports to provide a single communicating port between the passageways 27 of the sections 34 and 35. This communicating port is of course steam tight, and guides the steam in its flow from one section 34 to the other section 35. The clamps are then removed and the superheater unit is practically ccmple'te..

, At the open ends of the sections 34 and A 35, the inlet and outlet tubular connections and 5l are respectively welded or secured to the sections 34 and 35. The tubing from which these connections 5() and 5l are formed is preferably 11/2 in diameter, less than the original diameter of the pipe from which the sections 34 and 35 are formed. These leads are either' secured to the sections before their connection about the ports V33, or after l such connection. To accomplish the connection of these leads to the sections 34 and 35, the arcuate or concavoconvex sections 34 and 35 are swaged by machinery, and are butt welded to the tubing 50 and 51, and reinforced with electric arc or oxyacetylene welding. The leads 50 and 5l and their respective sections are preferably made up in straight pieces, and the lea-ds are bent into obtuse angular relation subsequent to their welding to their respective sections, at any angle to suit. It can be readily understood from Figures l and 5 of the drawings that the leads 50 and 5l are welded at approximately points to the open swaged ends of the concavo-convex cross sections 34 and 35.

The superheater unit A. when thus co1nplete has the sections 34 and 35 connected at the tire-box ends of said sections, and incident to the fact that this connection is at the crown of the sections 34 and 35, the unit A really provides four radially extendflow to uniformly heat the large exposed external surface of thel sections 34 and 35,

and to uniformly heat the thin stream of v iowing steam which first passes through the section 34 and through the communicating port into the section 35 and exits therefrom through the connecting pipe 5l. it is to be noted that rearwardly of the communicating port, the sections 34 and 3,5' are. spaced, as at 65, and this provides additional heating surface.

lt can readily be understood from the fore-going that a novel type of superheater' has been provided, which may he economi` cally manufactured to superheat steam in an efficient manner, by uniformly heating the superheated steam in a confined space, while the steam is flowing in a thin Ysheet through the superheater. By reason of the novel provision of the superheater unit, a maximum heating surface is provided therefor in the confined space within the heat conducting flues of the furnace, andrby rea* son of the-sharp dividing egdes and th '1 parallel unobstructed passageways 60 to G3 inclusive, the superheater doeswnot obstruct the draft, and hence there will be less scoty and cinders collectV than is ordinarily the case with complicated forms of superheaters, which .ignore the obstructing effect cfa draft. "Various changes in the shape, size.` and arrangement of parts may be made to the form ofv invention herein shown and described without departing from its spirit or the scope of the claims. A

E ciaim:

l. its an article of manufacture a superheater unit comprising a pair of 'substantially concavo-convex hollow sections longitudinally connected at their convex sides providing narrow passageways extending longitudinally therethrough, said passageways at'similar ends of said sections being open and at the opposite ends of said sectionshavinOv a communicating port.

2. its an article 'ofmanu'facture a superheater unit comprising apair' of substantially concavo-convex sections each providing narrow concave-convex shaped passage# ways extending longitudinally thereof, 'sa-idp concave-convex sections vonly being connected adjacent their outer 'ends at the convex sides thereof and through said connection providing a port communicating the pas'- sageways thereof, and inletv and outlet means for the opposite ends of said sections.

3. es an 'article of manufacture a super*- rca heater unit comprising a pair of hollow concave-convex elongated sections providing relatively narrow concavo-convex passageways extending longitudinally thereof, the sections at similar ends of each being closed and at the outer edges thereof providing sharp stream dividing edges, said sections adjacent said stream dividing edges being connected at the crown portions of the convex sides and through said connection providing a communicating port between the passageways of said sections, said sections opposite the above mentioned closed ends having inlet and outlet means for the passageways thereof.

A. As an article of manufacture va superheater unit comprising a pair of substantially concavo-convex hollow sections each providing elongated passageways therethrough which are shallow as to depth and wider than the depth throughout the length thereof, means connecting said sections at the convex sides thereof adjacent similar ends of the same and through said connection providing a port extending between the passageways, said sections at said ends being closed and at the opposite ends being open to provide an inlet way into one section and an outlet way from the other section.

5. As an article of manufacture a superheater unit comprising a pair of elongated tubes crescent shaped in cross section and y tion including a plurality of elongated radially disposed portions connected at the longitudinal center, and extending therefrom in spaced relation and providing passageways therethrough with communicating ports and inlet and outlet openings.

v`7. As an article of manufacture a superheater unit comprising a pair of elongated tubular sections, each of which are substantially crescent-shaped in cross section with crescent shaped passageways extending longitudinally therethrough, each section providing a convex side and a concave side, said sections at the convex sides thereof along the medial longitudinal line having a conneet-ion with a transverse communicating port therethrough so as to face the concave sides of said section outwardly, said sections having inlet and outlet openings therethrough at the ends opposite said communieating port.

8.k As an article of manufacture a superheater unit comprising a plurality of elongated tubular sections connected in a substantially X-shaped relation providing passageways therethrough with inlet and outlet openings and a connecting port for the passageways, said sections at the ends thereof opposite the inlet and outlet openings being closed and being tapered kto provide chisel edges in an X-shaped relation.

9. ln a superheater unit the combination of a pair of elongated substantially eoncavoconvex hollow sections having connection longitudinally at convex sides substantially midway between the opposite longitudinal edges of each whereby the said sections from said connection diverge in opposite directions with respect to each other, the said sections longitudinally therethrough having narrow and relatively wider elongated passageways having inlet and outlet Openings therefor and a communicating port remote from the inlet and outlet openings of said passageways.

FRANK W. SHUPERT. 

